I have had two sigma and two Tamron lenses over the years I think back when I had a Pentax camera and hey were great and affordable, of course I did read many views before getting them, as some of their lenses are not as good as others, but the sigma 150-600 and the Tamron 17-28 both have great reviews, infact what I am leaning for now is to eventually get the 12-28 2.8 and 28-70 2.8 Tamrons and as the 28-70 is a lot better than the kit lens that came with the camera, and they use the same filter size which. Is handy and those are good ranges for city shooting and for each visits also

Back int he day I used to do a lot of bush walks and hikes even camping overnight so I am pretty good with knowing what to do and not do to stay safe, but that said I dont think I will ever be heading to deep into wild areas i am not as young as I used to be LOL

WOW getting a pass for pro boxing would be so cool and a greta experience, now that you mention that I think if I ever got a chance to pal=ply for and get a pass to shoot events like that then the bigger lens would be a must

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